Chain grate for furnaces



June 7, 1927. l

A. L. MORGAN CHAIN @RATE Fox FURNAcEs Filed sept. 25 1925' ATTOR YS hhnllllllvnfa.

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Patented June 7, 1927.

ARTHUR L. MORGAN, or MQNTREAL, QUEBEC, CANADA.

oHArNeRA'rE Fon FURNAoEs.

Application filed September 25, 1925. Serial No. 58,659.

This invention relates to new and useful improvements in chain stokergrates for furnaces and particularly to the means forlocking the links,forming the fuel support' to the grate link rods, which extend acrossthe full width lof the gratev and the object of the invention is toprovide a very efiicient and simple link grate of the class described,in "which any one link will be'easily removed without`r disturbing Aordismantling any, of the adjacent links, thereby facilitating repairs tosuch grates should said links become burnt out or broken throughexcessive wear, accident or the like.

Another object is to provide a chain stoker grate which will be veryinexpensive to manufacture and easy to assemble in place.

In my invention, I provide a chain stoker grate of the endless typebuilt of a plurality of links, mounted onV rods which extend across thefull width or approximately the full width of the furnace. The linksforming the chain are provided with. fuel supporting surfaces and aremounted on the rods, open slots being provided in the depending webs, toform the bearing or contacting surfaces for the rods. The slots areprovided with flaring ends to facilitate the assembling of the grate andto hold the links in place. Key pins are driven through holes formed inthe links, the lower ends of said holes being so formed that thelowermost ends of the key pins are bent or curved around the lowermostsurface of the link rods, to hold the links in position.

In the drawings which show one embodiment of my invention;

Figure l is a side elevation of the links showing the key pins.

Figure 2 is an endk elevation of the link shown in `Figure 1.

Figure 3 is an end elevation of a side link, the side elevation of whichis similar to Figure 1.

Figure 4 is a plan of the link shown in Figure 1. n

Figure 5 is a plan view of a portion of a chain stoker grate constructedaccording to my invention. l

Referring more particularly to the drawings, 11 designates a stokergrate, formed of a series of intermediate links 12 and side links 13,mounted on rods 14 extending across the grate. In the drawings, I haveshown them in staggered relationship but lthe rods used.

this maybe altered to suitthe requirements formed integral with thevertically disposed Vwebs 16wliich havel enlarged bosses 17.` with slotsformed therein which engage with land restupon the rods`14. In thedrawing the rotls are shown Iround and the bearing surfaces of theslotssemicircular, but these may be made ovalor square 'to suit'the shape ofy l Y Each slot is openfat one end 18, and `flares outwardly toward thatend to allow for easy erection or dismantling-'of the links. Verticallydisposed holes 19, are formed in the webs of the links in closeproximity to the slots and the lowermost ends 20 of said holes arecurved towards the slots and communicate therewith to guide key pins 21driven into said holes, toward and under the rods 14 to lock the linksin position. In the drawing the key pins are shown of square ,crosssection for illustrative purposes only and it will be readily understoodthat the section of the key pins may be modified without departing fromthe spirit of the invention. The bosses 17 eX- tend beyond the edges ofthe fuel bearing surfaces of the links and corrugations or grooves 22may he formed in the surfaces to allow air to be blown into the fuelfrom the underside of the grate. In Figure 2 which shows one of theintermediate links, the web 16 is centrally -disposed and in Figure 3,which shows a side link the web 16a is shown to one side of the cent-.reline but this is only a manufacturc1"s detail and is shown as amodification.

In operation the key pins hold the links in bearing engagement with therods 14, and form a simple means for facilitating the erection of thegrate. The links are dropped onto the rods 14 and the key pins aredriven through the holes 19, the lower ends of which are formed in sucha manner as to cause the key pins to curve towards and partially aroundthe rods 14, to hold the links in position. In dismantling the lowerends of the key pins may be broken off or bent straight by means of acrow bar to clear the rods 14, so that the link may be easily removed.This construction is very simple and allows oneflink lto be removedwithout disturbing the remaindery of the links formisoV ing the grate.By providing grooves in the sides of the fuel bearing surfaces, air fromthe lower parts of the furnace may be blown through the grate to assistrn'aterially in complete combustion of the gases arising from theburning of the fuel carried by the grate.

Having thus described rny invention what I claim is l. A chain gratelink presenting a fuel bearing` surface formed Iwith an integraldepending web having a pair of spaced slots extending upwardly from thelower edge thereof to receive suitable supporting rods, there being apair ofl passages formed in said bearing surfaces and web to extenddownwardly therethrough from the top of the bearing surface, saidpassages being l0- cated between said slots and having their lower endscurved toward the slots-to cornrnunicate therewith near the mouthportions of the slots and key pins adapted to be driven downwardlythrough said passages whereby the lower ends of the pins are deflectedby the curved portions of the passages to project'across the inouthportions of the slots to retain the supporting rods therein.

2. A chain grate link presenting a fuel bearing surface formed with anintegral depending web having a slot extending inwardly fro-1n one edgethereof to receive a link supporting rod, there being a passage formedin said bearing surface and web t0 extend downwardly therethrough fromthe top of the bearing surface at one side of the slot with the lowerend of the passage curving toward the slot and communicating therewithat one side of and adjacent the nlouth portion of the slot and a pin ofgreater length than said passage adapted to be driven downwardlytherethrough whereby the lower end of t-he pin is guided by the curvedportion of the passage to project across the mouth of the slot to retainthe supporting rod therein.

ln witness whereof, I have iny hand.

hereunto set ARTHUR L. MORGAN.

